WO2017150358A1 - 使い捨ておむつ - Google Patents

使い捨ておむつ Download PDF

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Publication number
WO2017150358A1
WO2017150358A1 PCT/JP2017/006997 JP2017006997W WO2017150358A1 WO 2017150358 A1 WO2017150358 A1 WO 2017150358A1 JP 2017006997 W JP2017006997 W JP 2017006997W WO 2017150358 A1 WO2017150358 A1 WO 2017150358A1
Authority
WO
WIPO (PCT)
Prior art keywords
top sheet
low
slit
disposable diaper
low transmission
Prior art date
Application number
PCT/JP2017/006997
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
大島　彩
彩 高橋
Original Assignee
大王製紙株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Priority to US16/080,065 priority Critical patent/US11013643B2/en
Priority to EP17759824.0A priority patent/EP3424476B1/en
Priority to CN201780012902.9A priority patent/CN108697563B/zh
Publication of WO2017150358A1 publication Critical patent/WO2017150358A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15731—Treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/494—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means
    • A61F13/49406—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region
    • A61F13/49413—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region the edge leakage prevention means being an upstanding barrier
    • A61F13/49426—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region the edge leakage prevention means being an upstanding barrier the barrier having an absorbent medium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
    • A61F13/532—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
    • A61F13/532—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • A61F13/533—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having discontinuous areas of compression
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530007—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made from pulp
    • A61F2013/530029—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made from pulp being made from cotton
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530007—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made from pulp
    • A61F2013/530036—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made from pulp being made in chemically-modified cellulosic material, e.g. Rayon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530131—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made in fibre but being not pulp
    • A61F2013/530343—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made in fibre but being not pulp being natural fibres
    • A61F2013/53035—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made in fibre but being not pulp being natural fibres of cotton
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F2013/53445—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad from several sheets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F2013/53765—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterized by its geometry
    • A61F2013/53778—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterized by its geometry with grooves

Definitions

  • the present invention relates to a disposable diaper which is excellent in both absorbable amount and absorption speed.
  • the absorbable amount is determined according to the use of the product.
  • products intended for night use particularly night products for adults, are generally products that have a large absorbable amount.
  • many absorbers in order to secure an absorbable amount, many absorbers have an upper and lower two-layer structure.
  • absorption rate is absorption rate.
  • a product with a large absorbable amount needs to absorb a large amount of urine excreted quickly, but if the absorption rate is slow, leakage tends to occur.
  • One technique for improving the absorption speed with a product having an upper and lower two-layer structure of the absorber is to extend a slit penetrating the absorber in the thickness direction in the front-rear direction so as to include the crotch portion. In this case, the diffusibility of urine in the slit is increased, and urine can be directly absorbed by the lower layer absorber, so that the absorption speed is high.
  • the absorber has an upper and lower two-layer structure, if it is attempted to improve the absorption rate by providing a slit in the absorber, it is difficult to improve both the absorbable amount and the absorption rate.
  • the main problem of the present invention is to provide a disposable diaper which is excellent in both the absorbable amount and the absorption speed.
  • the present invention that has solved the above problems is as follows.
  • ⁇ Invention of Claim 1> Having a crotch part, a front part and a rear part extending respectively to the front side and the rear side of the crotch part,
  • the top sheet is made of a thermoplastic nonwoven fabric
  • the absorber comprises a lower layer absorber and an upper layer absorber provided on the front side thereof, At least the slit of a predetermined width extends in the front-rear direction in the upper layer absorber in the crotch portion, and the slit of a predetermined width is not provided in the lower layer absorber,
  • the top sheet has a depressed portion that falls into the slit, At least the depressed portion is a portion compressed in the thickness direction, and a plurality of low-permeability portions that are portions where the fibers are welded to each other with a gap
  • the low-permeability part is the part where the nonwoven fabric of the top sheet is compressed in the thickness direction, and the part where the fibers are welded to each other, where the liquid permeability is lower than the surroundings.
  • those that are almost completely formed into a film and do not transmit any liquid at all are included.
  • the upper layer absorber is provided with a slit and the lower layer absorber is not provided with a slit, and the amount of absorption is ensured as much as possible.
  • slit means a through portion on the front and back of the absorber.
  • predetermined width with respect to the slit does not mean that the width of the gap is constant, and that it does not include a concave groove or a slit that does not have a width of the gap (contacting the opposite side wall), and does not mean that the width is constant, Therefore, as long as it has a width
  • the area ratio of the low transmission portion in the falling portion of the top sheet (Function and effect) As is clear from the examples to be described later, the area ratio of the low transmission portion in the falling portion of the top sheet (the ratio of the total area of the low transmission portion located in the falling portion to the total area of the falling portion) is within this range. When it is, the improvement of the remarkable absorption rate can be brought about.
  • the shape of the low-permeability part can be determined as appropriate, but by adopting such a shape and arrangement, the urine diffusivity in the front-rear direction is further enhanced.
  • the low-transmitting portion is a portion welded to a member on the back side, and a portion between the low-transmitting portions is a convex portion protruding to the front side. Disposable diapers.
  • the low-permeability portion of the top sheet may be provided in any form, but it is a preferable form that the top sheet is provided to fix the top sheet to the member on the back side and to form the convex portion on the surface.
  • the crotch part is sandwiched between both legs of the wearer and contracts to some extent in the width direction, and even if the slit is crushed in the width direction, A gap is maintained around the convex portion, and the improvement in diffusibility is less likely to be hindered.
  • FIG. 2 is a YY sectional view of FIG. 1.
  • FIG. 2 is a sectional view taken along line XX in FIG.
  • A Schematic sectional view of the developed state
  • B Schematic plan view of the developed state.
  • A Schematic sectional view of the developed state
  • B Schematic plan view of the developed state.
  • FIG. 8 is a cross-sectional view of another form corresponding to the XX cross section of the form shown in FIG. 7. It is a top view of another absorber.
  • FIG. 13 is a cross-sectional view showing a cross section 1-1, 2-2, and 3-3 in FIG. It is explanatory drawing of the example of an assembly equipment of a top sheet and a second sheet. It is the schematic from the upper direction of the assembly of a top sheet and a second sheet. It is the schematic of the top sheet surface of a comparative sample. It is (a) principal part sectional drawing of a pushing roll, and (b) the expansion
  • groin in the terminology of the present invention means a part that corresponds to the crotch of the body at the time of use, and depending on the product, from the center in the front-rear direction of the article as shown in the figure to the predetermined part on the front side.
  • front part (abdominal part) means a part on the front side of the crotch part
  • rear part (back side part) means a part on the rear side of the crotch part.
  • FIG. 1 to 4 show a pad-type disposable diaper example 200 according to the present invention.
  • This pad-type disposable diaper 200 has a crotch portion C2, and a front portion F2 and a rear portion B2 extending on both front and rear sides thereof.
  • the dimensions of each part can be determined as appropriate.
  • the total length (length in the front-rear direction) L is about 350 to 700 mm
  • the total width W1 is about 130 to 400 mm (however, wider than the width of the absorbent surface of the diaper).
  • the length of the crotch portion C2 is about 10 to 150 mm
  • the length of the front portion F2 is about 50 to 350 mm
  • the length of the rear portion B2 is about 50 to 350 mm.
  • the width C3 of the crotch portion C2 can be set to 150 cm or more, particularly about 200 to 260 cm for adults.
  • the pad-type disposable diaper 200 has a basic structure in which absorbers 23A and 23B are interposed between an inner surface of a liquid-impermeable sheet 21 having an outer sheet 27 laminated on the outer surface and a liquid-permeable top sheet 22. is doing.
  • the liquid-impermeable sheet 21 is provided on the back side of the absorbers 23A and 23B so as to protrude slightly from the peripheral edges of the absorbers 23A and 23B.
  • a sheet having moisture permeability can be used in addition to a polyethylene film or the like without impairing the water barrier from the viewpoint of preventing stuffiness.
  • This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used.
  • the outer surface of the liquid-impermeable sheet 21 is covered with an exterior sheet 27 made of a nonwoven fabric, and the exterior sheet 27 protrudes outside the periphery of the backsheet 21 with a predetermined protrusion width.
  • Various nonwoven fabrics can be used as the exterior sheet 27.
  • synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.
  • the front side of the absorbers 23A and 23B is covered with a liquid-permeable top sheet 22.
  • the absorbers 23A and 23B partially protrude from the side edges of the top sheet 22 in the illustrated form, the width of the top sheet 22 can be increased so that the side edges of the absorbers 23A and 23B do not protrude.
  • a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used as the top sheet 22 .
  • synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.
  • the intermediate sheet 25 is provided to prevent the urine that has been absorbed by the absorbers 23A and 23B from reversing, and is made of a material having low water retention and high liquid permeability, such as various nonwoven fabrics and mesh films. It is desirable to use it.
  • the front end of the top sheet 22 is 0% and the rear end of the top sheet 22 is 100%
  • the front end of the intermediate sheet 25 is preferably located in the range of 0 to 11%. It is preferably in the range of 92 to 100%.
  • the width W4 of the intermediate sheet 25 is preferably about 50 to 100% of the minimum width W5 of the constricted portion 23n of the absorbers 23A and 23B described later.
  • the exterior sheet 27 and the liquid-permeable top sheet 22 are respectively attached to the front and rear ends of the absorbers 23A and 23B so as to extend to the front and rear sides.
  • a non-existing end flap portion EF is formed.
  • the exterior sheet 27 is extended outward from the side edges of the absorbers 23A and 23B, and the inner surface of the portion from the extension to the side of the top sheet 22 is A portion 24x on the outer side in the width direction of the gather sheet 24s forming the three-dimensional gathers 24 is pasted over the entire front-rear direction to constitute a side flap portion SF in which the absorbers 23A and 23B are not present.
  • pasted portions are shown in a hatched pattern in FIG. 1 and can be formed by hot melt adhesive, heat sealing, or ultrasonic sealing.
  • the liquid-impermeable sheet 21 can be extended to the side flap part SF instead of the exterior sheet 27 to form the outer surface side of the side flap part SF.
  • a plastic sheet or a melt-blown nonwoven fabric can be used, but from the viewpoint of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used.
  • a portion 24c on the center side in the width direction of the gather sheet 24s extends to the top sheet 22, and an elongated elastic member 24G is stretched along the front-rear direction at the end portion on the center side in the width direction. It is fixed with a melt adhesive or the like.
  • the elongated elastic member 24G styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, etc., which are formed in a thread shape, a string shape, a belt shape, or the like. Ordinarily used materials can be used.
  • both gather sheets 24s are fixed by being bonded to the inner surface of the article (in the illustrated form, the surface of the top sheet 22 and the inner surface of the exterior sheet 27) throughout the entire front and rear direction of the gather sheets 24s.
  • 24c is bonded and fixed to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment) at both ends in the front-rear direction, and is fixed to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment) between both ends in the front-rear direction.
  • the non-fixed portion is a portion that serves as a leakage prevention wall that stands up elastically with respect to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment). It is located at the boundary between the fixed portion 24x on the outer side in the width direction at 24s and the inner portion 24c.
  • the absorbers 23A and 23B have a two-layer structure including a lower layer absorber 23B and an upper layer absorber 23A provided on the front side.
  • the upper layer absorbent body 23A and the lower layer absorbent body 23B are basically made of pulp fiber piles, aggregates of filaments such as cellulose acetate, or non-woven fabrics, and if necessary, mixed and fixed with a superabsorbent polymer such as particles. And the like can be used.
  • the lower layer absorbent body 23B is preferably an accumulation of at least pulp fibers, and is particularly preferably a mixed accumulation of pulp fibers and superabsorbent polymer particles.
  • the upper absorbent body 23A is preferably a mixed accumulation of pulp fibers and superabsorbent polymer particles.
  • the superabsorbent polymer particles 23p contained in the upper layer absorber 23A and the lower layer absorber 23B those used in this type of absorbent article can be used as they are, for example, the same as the upper layer absorber 23A and the lower layer absorber 23B.
  • screening using a 500 ⁇ m standard sieve (JIS Z8801-1: 2006) (shaking for 5 minutes), and under this screening
  • the falling particles are subjected to sieving (shaking for 5 minutes) using a 180 ⁇ m standard sieve (JIS Z8801-1: 2006)
  • the proportion of particles remaining on the 500 ⁇ m standard sieve is 30% by weight or less.
  • the proportion of particles remaining on a 180 ⁇ m standard sieve is preferably 60% by weight or more.
  • the particle size distribution of the superabsorbent polymer particles used for the upper layer absorber 23A is the standard of 500 ⁇ m and 180 ⁇ m described above.
  • the proportion of particles remaining on the 500 ⁇ m standard sieve is 50% by weight or less, and the proportion of particles remaining on the 180 ⁇ m standard sieve is preferably 50% by weight or more.
  • the particle size distribution of the superabsorbent polymer particles used for the body 23B is 180 ⁇ m when the proportion of particles remaining on the 500 ⁇ m standard sieve is 25% by weight or less when the above-mentioned 500 ⁇ m and 180 ⁇ m standard sieves are screened.
  • the ratio of the particles remaining on the standard sieve is preferably 70% by weight or more.
  • the superabsorbent polymer particles are not particularly limited, but those having a water absorption rate of 20 to 50 seconds and a water absorption of 50 to 80 g / g can be preferably used.
  • Examples of the superabsorbent polymer particles 18p and 19p include starch-based, cellulose-based and synthetic polymer-based polymers such as starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, sodium carboxy.
  • a crosslinked product of methyl cellulose or an acrylic acid (salt) polymer can be used.
  • the fiber basis weight and the basis weight of the superabsorbent polymer in the absorbers 23A and 23B can be determined as appropriate, but the basis weight of the fiber is preferably about 100 to 600 g / m 2, and the basis weight of the superabsorbent polymer particles is The total amount of the absorber is preferably about 100 to 350 g / m 2 .
  • the weight ratio of the superabsorbent polymer particles to the pulp fibers in the upper layer absorbent body 23A is higher than the weight ratio of the superabsorbent polymer particles to the pulp fibers in the lower layer absorbent body 23B. That is, in the absorbers 23A and 23B, the liquid L of excreta is also supplied to the upper layer absorber 23A, but is supplied to the lower layer absorber 23B through the slit 40 preferentially.
  • the weight ratio of the superabsorbent polymer particles to the pulp fibers in the lower layer absorbent body 23B is lower than that of the upper layer absorbent body 23A, gel blocking is less likely to occur than the upper layer absorbent body 23A, and the excreta liquid is absorbed in the lower layer absorbent. It diffuses more widely in the body 23B. Then, the liquid component absorbed in the lower layer absorber 23B is transferred to the upper layer absorber 23A so as to be sucked up by the upper layer absorber 23A at least after the absorption saturation of the lower layer absorber 23B. Absorbed and retained.
  • the upper layer absorbent body 23A has a high weight ratio of the superabsorbent polymer particles to the pulp fibers, can absorb and retain a larger amount of liquid, and the lower layer absorbent body 23B preferentially absorbs the upper layer absorbent body 23A.
  • the remaining absorption capacity is left until the end. As a result, the anti-reverse property is further improved.
  • the superabsorbent polymer particles contained in the lower layer absorber 23B have excellent liquid permeability. Specifically, the absorption rate is 20 to 35 seconds and the absorption amount is 50 to 70 g / g. Some are preferable, and the superabsorbent polymer particles contained in the upper-layer absorbent body 23A are those having a large absorption amount, specifically, those having an absorption rate of 60 to 80 seconds and an absorption amount of 50 to 80 g / g. is there.
  • the weight ratio of the superabsorbent polymer particles to the pulp fibers in the upper layer absorbent body 23A is higher than the weight ratio of the superabsorbent polymer particles to the pulp fibers in the lower layer absorbent body 23B, the upper layer absorbent body 23A and the lower layer absorbent body.
  • the weight ratio of the superabsorbent polymer particles to the pulp fibers in 23B can be determined as appropriate, the total weight of the upper absorbent body 23A (the sum of the pulp 19f and the superabsorbent polymer particles) is 350 to 700 g / m 2
  • the weight ratio of the superabsorbent polymer particles to the pulp fibers in the upper layer absorbent body 23A is preferably about 55 to 100%, particularly 65 to 90%.
  • the weight ratio of the high absorbent polymer particles to the pulp fibers in the lower layer absorbent body 23B is 0. It is preferably about 50%, particularly 30-40%.
  • the upper layer absorbent body 23A and the lower layer absorbent body 23B may be integrally or individually wrapped with a wrapping sheet 26 having liquid permeability and liquid retention, such as crepe paper, for holding the shape and polymer as required. it can.
  • the absorbers 23A and 23B extend from the front part F2 to the rear part B2.
  • the upper layer absorber 23A can have the same dimensions as the lower layer absorber 23B, but it is desirable that the total length and the entire width of the upper layer absorber 23A be shorter than that of the lower layer absorber 23B as shown in the figure.
  • the total length of the upper layer absorber 23A can be about 60 to 90% of the total length of the lower layer absorber 23B
  • the total width of the upper layer absorber 23A can be about 60 to 90% of the total width of the lower layer absorber 23B. be able to.
  • the shapes of the upper-layer absorbent body 23A and the lower-layer absorbent body 23B can be determined as appropriate, and can be rectangular, but at least the larger absorbent bodies 23A and 23B (lower-layer absorbent body 23B in the illustrated example) It is preferable that the predetermined portion in the middle in the front-rear direction including C2 is formed as a narrow portion 23n having a narrow width.
  • the minimum width W5 of the constricted portion 23n is preferably about 50 to 65% of the width W2 of the non-constricted portion located before and after the constricted portion 23n.
  • the front end of the constricted portion 23n is preferably located in the range of 10 to 25%, and the rear end of the constricted portion 23n is 40 to 65%. It is preferable that the portion having the minimum width W5 (minimum width portion) of the constricted portion 23n is preferably in the range of 25 to 30%.
  • a slit 40 having a predetermined width extends in the front-rear direction in at least the front-rear region corresponding to the crotch C2 in the upper-layer absorber 23A, and the lower-layer absorber.
  • 23B is not provided with a slit 40 having a predetermined width.
  • the lower layer absorbent body 23B may have a wide cut.
  • the top sheet 22 has a depressed portion 30 that falls into the slit 40 of the upper-layer absorbent body 23A. As shown in FIGS.
  • At least the depressed portion 30 has a number of low-permeability portions 80 which are portions compressed in the thickness direction and where the fibers are welded to each other at intervals.
  • the front side portions of the intermediate sheet 25 and the packaging sheet 26 exist between the top sheet 22 and the upper layer absorbent body 23 ⁇ / b> A, the front side portions of the intermediate sheet 25 and the packaging sheet 26 are also slit 40 together with the top sheet 22. It will fall inside. Other than the top sheet 22 may be omitted.
  • the length 40L in the front-rear direction is not particularly limited. Therefore, the slit 40 can be provided over the entire front-rear direction of the upper layer absorbent body 23A. It is desirable to extend from the crotch side end part to the crotch side end part of the rear part B2. Moreover, as shown to Fig.9 (a), the part of the rear side of the slit 40 can also be bent toward the width direction outer side (the front side can also be bent similarly). More specifically, when the front end of the disposable diaper 200 is 0% and the rear end of the disposable diaper 200 is 100%, the front end of the slit 40 is preferably located in a range of 15 to 30%. The rear end of 40 is preferably located in the range of 40 to 70%.
  • the front and rear ends of the slit 40 do not penetrate the peripheral edge of the upper layer absorbent body 23A, but the rear end (which may be the front end or both ends) is used as the peripheral edge as in the example shown in FIG. You may make it reach.
  • the portion on the side of the slit 40 is a separate body from the portion between the slits 40.
  • a center slit 41 can be added at the center in the width direction as shown in FIG.
  • the position in the width direction of the slit 40 is preferably symmetrical, and the interval 40D between the slits 40 is usually about 10 to 30% of the minimum width W5 of the constricted portion 23n of the absorbers 23A and 23B. Is preferred.
  • the number of slits 40 is not limited, and only one slit 40 can be provided along the front-rear direction at the center in the width direction as shown in FIGS.
  • the width 40W of the slit 40 is not particularly limited as long as the opposing side walls are spaced apart from each other. However, in a normal case, it is desirable that the width 40W be about 10 to 20% of the minimum width W5 of the constricted portion 23n of the absorbers 23A and 23B. Specifically, in the case of an adult product, it can be about 5 to 32 mm.
  • the sagging portion 30 has a large number of low-transmitting portions 80, the permeability in the sacrificing portion 30 is limited.
  • the diffusivity is improved by the amount.
  • the slit 40 is provided in the upper layer absorber 23A and the slit 40 is not provided in the lower layer absorber 23B.
  • the urine diffusibility in 40 becomes high, and as a result, absorption saturation hardly occurs and the absorption rate is high.
  • the extent to which the low transmission part 80 is formed can be determined as appropriate, but as is clear from the examples described later, the area ratio of the low transmission part 80 in the region having the low transmission part 80 is 4% or more. And a significant improvement in the absorption rate can be achieved.
  • the area ratio of the low transmission part 80 in the depressed part 30 is particularly preferably 7% or more.
  • each low-transmitting portion 80 is circular (see FIG. 22), oval, square, rectangular (see FIG. 21 (a)), linear (see FIG. 23), and other polygonal shapes.
  • Crescent moon shape see FIG. 21B
  • star shape star shape, cloud shape, etc. can be determined as appropriate.
  • the arrangement of the low transmission portions 80 can be determined as appropriate, and the row of intermittent or continuous low transmission portions 80 in the front-rear direction may be provided in only one row with respect to the drop portion 30. It is desirable that the rows of the low transmission portions 80 intermittently or continuously in the direction are formed in a plurality of rows at intervals in the width direction and with or without shifting the position in the front-rear direction.
  • the arrangement of the low transmission portions 80 may be irregular, but it is desirable that the low transmission portion 80 has a regular pattern as a whole.
  • the low transmission part 80 is provided in the sagging part 30, it may be provided only in a part of the sagging part 30 (for example, an intermediate part in the front-rear direction) or only in its entirety, but it is accurately located at the position of the slit 40 of the upper absorber 23A. Since it is difficult to manufacture together, as shown in FIGS. 5 and 6, a region 11 (for example, at least one of the width direction and the front-rear direction) including the depressed portion 30 in the top sheet 22 and wider than the depressed portion 30. In this case, it is preferable that the top sheet 22 is formed as a whole.
  • the region 11 where the low transmission part 80 is provided coincide with the range of the intermediate sheet 25 as shown in FIG.
  • a plurality of slits 40 are provided at intervals in the width direction, although not shown, a plurality of regions 11 having the low transmission portions 80 can also be provided at intervals in the width direction.
  • the dimension of the low transmission part 80 can be determined suitably.
  • the length in the front-rear direction (for example, reference numeral 80 m in the form described later) is about 0.5 to 3.0 mm, particularly about 0.7 to 1.1 mm. it can.
  • the width of the low transmission part 80 (for example, reference numeral 80c in the form described later) is usually 0.5 to 3.0 mm, particularly about 0.7 to 1.1 mm.
  • the low permeability portion 80 longitudinal direction intermittently providing the area of each of the low permeability portion 80 can be a 0.19 ⁇ 7.1 mm 2, particularly 0.38 ⁇ 0.95 mm 2 approximately.
  • the center interval between adjacent columns can be larger than the column width, preferably about 1 to 5 times larger, and is usually 0.5 to 15 mm. Can be about.
  • one preferred form is a form in which the low transmission portions 80 elongated in the front-rear direction are provided intermittently in the front-rear direction at intervals shorter than the length in the front-rear direction.
  • the low transmission part 80 is continuous from the front end to the rear end of the region 11 having the low transmission part 80.
  • the low-permeability portion 80 of the top sheet 22 may be formed in any form.
  • the low-permeability portion 80 is bonded to the fiber by welding the fibers.
  • the low-permeability portion 80 is a portion where the fibers are welded, it is one preferable embodiment to fix the top sheet 22 to the member on the back side using this. .
  • part between the low permeable parts 80 is not compressed but becomes the convex part 31 which protrudes to the front side, it will also serve as formation of the convex part 31 on the surface.
  • the low transmission part 80 is compressed relative to the surroundings, and is joined to a member on the back side (the intermediate sheet 25 in the case of the illustrated embodiment). It is formed as much as possible, and the arrangement, size, and shape of the convex portion 31 can be determined by the arrangement, size, and shape of the low transmission portion 80. In other words, depending on the desired arrangement of the protrusions 31, it is sufficient to provide a single low density part 80 or a plurality of low transmission parts 80 around at least three sides around the convex part 31. A region having the convex part 31 and a region having a low transmission part 11 is almost the same.
  • the front-rear dimension 31 m of the convex portions 31 is the distance 32 m between the convex portions 31 arranged in the front-rear direction. Larger is preferred.
  • the width direction dimension 31c of the protrusions 31 is larger than the interval 32c of the protrusions 31 arranged in the width direction. If the dimensions 31m and 31c of the convex part 31 are small, the distances 32m and 32c of the convex part 31 are too wide, or the convex part 31 fits between the adjacent convex parts 32, the above-described space securing action is local.
  • the convex portion 31 on one opposing side surface does not enter between the convex portions 31 on the other opposing side surface, regardless of the arrangement and the deformation of the depressed portion 30. Since the convex portions 31 are in contact with each other, a more preferable space securing state is obtained.
  • the interval between the convex portions 31 arranged in the width direction is preferably 0.5 to 0.9 times the width direction dimension of the convex portions 31.
  • sequence of the convex part 31 is a zigzag-like arrangement
  • the part (low-rigidity part) between the convex parts 31 is the most linear in the center of the width direction of the convex part 31 arranged in zigzag in the front-back direction. Therefore, when the width of the slit 40 is narrowed, the top sheet 22 is bent at this position Q.
  • the convex portions 31 are arranged with the above-described dimensions and intervals, the convex portions 31 on one opposing side surface are unlikely to enter between the convex portions 31 on the other opposing side surface, and the opposing convex portions 31 are likely to contact each other. Therefore, a more preferable space securing state is obtained.
  • the interval 32c between the convex portions 31 arranged in the width direction is 0.1 to 0.5 times the width direction dimension 31c of the convex portions 31.
  • the portion (low-rigidity portion) between the convex portions 31 is the straightest line 32 c between the convex portion 31 rows adjacent in the width direction. Therefore, when the width of the slit 40 is reduced, the top sheet 22 is bent at this position 32c.
  • the convex portions 31 are arranged with the dimension 31c and the interval 32c, the convex portions 31 on one opposing side surface do not enter between the convex portions 31 on the other opposing side surface, and the opposing convex portions 31 contact each other. Therefore, a more preferable space securing state is obtained.
  • the specific dimensions, shape, arrangement, and structure of the convex portions 31 in the top sheet 22 are not particularly limited and can be determined as appropriate.
  • An example is as follows.
  • a large number of convex portions 31 can be arranged at intervals in the width direction and the front-rear direction. it can.
  • Reference numeral 32 denotes a portion between adjacent convex portions 31.
  • This arrangement pattern can be changed as appropriate, for example, in a matrix form as shown in FIG. 11 or in a staggered form (arranged alternately in adjacent rows) as shown in FIGS.
  • the form which provides the convex part 31 over the substantially whole top sheet 22 is assumed in the illustration form, as long as it is provided in the depression part 30 at least as mentioned above, it can also provide partially, for example, The top sheet 22 and the intermediate sheet 25 can be provided over almost the entire region.
  • the dimensions and the like of the convex portion 31 can be determined as appropriate, but as shown in FIGS. 10 to 12, the dimension 31m in the MD direction of the convex portion 31 is the same as that of the low transmission portion 80 located on one side of the convex portion 31 in the MD direction.
  • the center distance with respect to the low transmission part 80 located on the other side is set to 80y or less, and the lower limit is preferably about 0.9 times, and is usually about 2.7 to 9 mm.
  • the CD direction dimension 31c of the convex portion 31 is set to be equal to or less than the center interval 80x between the low transmission portion 80 located on one side of the convex portion 31 in the CD direction and the low transmission portion 80 located on the other side. It is preferably about 0.9 times, and is usually about 2.7 to 9 mm.
  • the height 31z of the convex portion 31 is preferably about 0.8 to 2 mm in a normal case.
  • MD direction and CD direction in the manufacturing method mean “MD direction” and “CD direction” of the processing equipment of the convex portion 31, and either one is the front-rear direction, and the other Is the width direction.
  • the MD direction in the product is the fiber orientation direction of the nonwoven fabric of the top sheet 22.
  • the fiber orientation is the direction along which the fibers of the nonwoven fabric are aligned.
  • the fiber orientation can be determined from the measurement method according to the TAPPI standard method T481, the fiber orientation test method using the zero-range tensile strength, and the tensile strength ratio in the front-rear direction and the width direction. It can be discriminated by a simple measuring method for determining the orientation direction.
  • the front-rear direction is the MD direction and the width direction is the CD direction, as with almost all disposable diaper products.
  • the arrangement interval of the protrusions 31 can be determined as appropriate, but in the case of a matrix arrangement as shown in FIG. 11, the CD direction center interval 31x of the MD direction row of the protrusions 31 adjacent in the CD direction is about 3 to 10 mm.
  • the center distance 31y in the MD direction of the CD direction row of the protrusions 31 adjacent in the MD direction is preferably about 3 to 10 mm.
  • the CD direction center interval 31x of the MD direction row of the protrusions 31 adjacent in the CD direction is about 3 to 10 mm, and the protrusions 31 adjacent in the MD direction are
  • the MD direction center interval 31y of the CD direction row is preferably about 3 to 10 mm.
  • the shape of the convex portion 31 is preferably a circular dome shape, but may be an elliptical dome shape or a regular polygon dome shape.
  • the convex portion 31 can be formed by embossing the top sheet 22.
  • the portion between the convex portions 31 adjacent in the width direction and the front-rear direction in the top sheet 22 is joined to the intermediate sheet 25 by pressure welding, so that the width direction and the front-rear direction are increased.
  • a number of low transmission portions 80 are formed in an intermittent pattern in the direction.
  • the low transmission part 80 is also a part that forms the bottom of the recess. Characteristically, in the joining pattern of the top sheet 22 and the intermediate sheet 25, in the region between the convex portions 31 adjacent to each other in the MD direction, a row in which a plurality of low transmission portions 80 are arranged at intervals in the CD direction.
  • the intermediate sheet 25 may be compressed integrally with the top sheet 22 or may not be compressed.
  • the portions other than the low transmission portion 80 and the compression portion 81 may be compressed in the same manner as the interval portion in the CD direction without the top sheet 22 and the intermediate sheet 25 being welded, but the top sheet 22 and the intermediate sheet 25 may be compressed.
  • FIG. 15 shows a sample of the assembly of the top sheet 22 and the intermediate sheet 25 that employs the pattern shown in FIG. 10 and FIG. 12 (b).
  • the convex portion 31 is clear from the comparison between the sample shown in FIG. 15 and the sample shown in FIG. Even if a vertical hook is formed at the time of forming, the low-permeation portion 80 by pressure welding and the compressed portion 81 compressed without welding are CD so as to cross the vertical hook when joining with the intermediate sheet 25. Since the directions are alternately alternated, the low transmission part 80 can be formed in a state in which the vertical hook is further extended, and the state or a state close thereto is maintained even after manufacturing.
  • the joined portions are intermittent in the CD direction, it is possible to prevent a decrease in flexibility and a deterioration in appearance.
  • the comparative sample having the low transmission part 80 that does not satisfy the above conditions a large number of wrinkles along the MD direction are formed at intervals in the CD direction, and the appearance is deteriorated.
  • the bonding pattern is not particularly limited as long as a plurality of low transmission portions 80 are arranged at intervals in the CD direction in the region between the convex portions 31 adjacent in the MD direction, and the CD direction interval portions are connected by the compression unit 81. 11 (b) and 12 (a), when the low transmission part 80 is formed at the CD direction center position corresponding to the CD direction center part of the convex part 31 adjacent to the MD direction, the wrinkle prevention is achieved.
  • it is preferable from the viewpoint it is preferable to use a pattern in which the low transmission part 80 is not formed at the center position in the CD direction as shown in FIGS. 11A and 12B because it becomes more flexible. In the former case, it is also preferable from the viewpoint of flexibility to make the area of the low transmission part 80 at the center position in the CD direction smaller than the areas of the other low transmission parts 80.
  • a row in which a plurality of low transmission portions 80 are arranged at intervals in the CD direction is provided, as shown in FIGS.
  • a plurality of rows can be provided at intervals in the MD direction.
  • the former is suitable for a pattern in which the convex portions 31 are arranged in a matrix, as shown in FIG. 11, and the convex portions 31 are arranged in a staggered manner. This is suitable for a pattern in which the convex portion 31 has a wide interval in the MD direction as shown in FIGS.
  • the interval portion in the MD direction of the low transmission portion 80 may be compressed in the same manner as the interval portion in the CD direction without the top sheet 22 and the intermediate sheet 25 being welded. Further, when the intermediate sheet 25 is not welded and the top sheet 22 is not compressed (including non-compressed, which is not compressed at all) than the interval portion in the CD direction, more excellent flexibility and appearance can be obtained.
  • each low transmission part 80 between the convex parts 31 adjacent to MD direction has MD direction length 80m, MD.
  • MD has MD direction length 80m, MD.
  • the joints are dotted joints that are about 0.1 to 0.4 times (usually, for example, 0.5 to 3 mm) of the CD direction center interval 31x in the MD direction row of the adjacent convex portions 31.
  • the CD-direction interval 80d between the low transmission portions 80 adjacent to each other in the CD direction is preferably about 1 to 5 times the normal CD length 80c of the low transmission portion 80 (for example, 0.5 to 15 mm in a normal case).
  • the number of the low transmission portions 80 in the CD direction row is preferably about 2 to 4.
  • the distance between the protrusions 31 adjacent to each other in the CD direction is also between the protrusions 31 adjacent to each other in the MD direction.
  • the low transmission part 80 similar to that between the convex parts 31 is provided, as shown in FIG. 11, in the case where the convex parts 31 are arranged in a matrix, between the convex parts 31 adjacent in the MD direction.
  • the low transmission part 80 is also provided intermittently in the MD direction between the convex parts 31 adjacent in the CD direction.
  • the pattern of the low transmission part 80 between the convex parts 31 adjacent to CD direction is not specifically limited, It is preferable to arrange the dot-like low transmission part 80 at intervals in MD direction, and FIG.11 (b) As shown, the compression portion 81 can be formed in the gap portion in the MD direction similarly to the gap portion in the CD direction.
  • the MD direction rows of the low transmission portions 80 may be provided in one row at an intermediate position between the convex portions 31 adjacent to each other in the CD direction as in the illustrated example, or may be provided in a plurality of rows at intervals in the CD direction.
  • the size of the dot-like low transmission part 80 is not particularly limited, but the MD direction length 80 m is 0.1 to 0.
  • the CD direction length 80c is 0.1 to 0.4 times the CD direction center interval 31x of the MD direction row of the protrusions 31 adjacent in the CD direction. It is preferably about (normally, for example, 0.5 to 3 mm).
  • the low transmission part 80 in the form shown in FIGS. 11 and 12 is formed in an intermittent joining pattern in the width direction and the front-rear direction, and the interval in each direction can be appropriately determined.
  • the CD direction joining range A3 between the low transmission portions 80 between the portions 31 is 0.3 to 1 times the CD direction center interval 31x in the MD direction row of the convex portions 31 adjacent in the CD direction (usually, for example, 1 to 1). 10 mm), and the MD direction joining range A4 by the low transmission portions 80 between the convex portions 31 adjacent in the CD direction is the MD direction of the CD direction row of the convex portions 31 adjacent in the MD direction. It is preferably about 0.3 to 1 times the center interval 31y (for example, 1 to 10 mm in a normal case). If the CD direction joining range A3 and the MD direction joining range A4 are too wide, the low transmission part 80 is not different from being continuous in the CD direction and the MD direction, and the transparency and flexibility of the top sheet 22 may be reduced. .
  • FIG. 14 shows a processing facility for forming the above-described convex portion 31 and the low transmission portion 80 and joining the top sheet 22 and the intermediate sheet 25. That is, this equipment includes a push roll 90, a concave roll 91 that faces the push roll 90, and a joining roll 92 that faces the concave roll 91.
  • the pushing roll 90 has a large number of pushing protrusions 90 a formed on the peripheral surface in the arrangement pattern of the protrusions 31 described above.
  • the shape of the convex part of the pushing roll 90 can be determined as appropriate, it is preferably a truncated cone shape having a cross section (for example, a circle, an ellipse, a regular polygon, etc.) that matches the shape of the convex part 31 to be formed. .
  • the concave roll 91 is provided with a pressing concave portion 91a corresponding to the pressing convex portion 90a of the pressing roll 90 on the peripheral surface, and between the pressing concave portions 91a, a bonding convex portion 91b and a compression convex portion 91e.
  • the joint convex portion 91b is a portion for forming the low transmission portion 80 in the above-described joint pattern, and the compression convex portion 91e welds the top sheet 22 and the intermediate sheet material 25S in the interval portion in the CD direction of the low transmission portion 80. It is a part for compressing the nonwoven fabric 22S used as the top sheet 22 without thickness in the thickness direction.
  • the intermediate sheet 25 is also simultaneously compressed by the compression protrusions 91e.
  • a row in which a plurality of joint convex portions 91b are arranged at intervals in the roll axial direction is a roll axis of the region. It is formed so as to cross the center position in the direction, and the interval portion in the roll axis direction of the joint convex portion 91b is a compression convex portion 91e.
  • the portions other than the joint convex portion 91b, the compression convex portion 91e, and the push-in concave portion 91a are portions that do not compress the material, but may be portions that compress the same or less than the compression convex portion 91e. .
  • the indentation recess 91a of the concave roll 91 may be an “open hole” that does not have a bottom surface and is large enough for the indentation convex portion to enter, and the “indentation recess 91a” includes such an “open hole”. It is.
  • the size / shape / arrangement of the push-in convex part 90a in the push-in roll 90 corresponds to the inner dimension / shape / arrangement of the convex part 31 to be formed. This corresponds to the external dimensions / shape / arrangement of the convex portions 31 to be formed. Further, the size / shape / arrangement of the joint convex portion 91b in the concave roll 91 corresponds to the size / shape / arrangement of the low transmission portion 80 to be formed. The arrangement corresponds to the size, shape, and arrangement when the compression portion 81 is formed. Therefore, these dimensions, shape, and arrangement can be changed in the same manner as the dimensions, shape, and arrangement of the convex portion 31, the low transmission portion, and the compression portion described in the section of the disposable diaper.
  • the length 91m in the MD direction, the length 91c in the CD direction, and the interval 91d in the CD direction in the form shown in FIG. 18B are the same as those in the form shown in FIG. It can be within the same range as the MD direction length 80 m, the CD direction length 80 c, and the CD direction interval 80 d.
  • the nonwoven fabric 22S to be the top sheet 22 is transported by pulling from the downstream side of the production line, and is sandwiched between the pressing roll 90 and the concave roll 91 as shown in FIG.
  • the convex portion 31 is formed by embossing into the pressing concave portion 91 a of the roll 91.
  • the intermediate sheet material 25S is pulled outside the nonwoven fabric to be the top sheet 22 by pulling from the downstream side of the production line. As shown in FIG.
  • the nonwoven fabric 22S to be the top sheet 22 and the intermediate sheet material 25S are sandwiched between the concave roll 91 and the joining roll 92, and the compression convex portion 91e of the concave roll 91 and the peripheral surface of the joining roll 92
  • the low transmission part 80 is formed by press-welding between the joining convex part 91b of the concave roll 91 and the peripheral surface of the joining roll 92, and the top sheet 22 and the intermediate sheet 25 are assembled. Manufacture the body.
  • the assembled assembly of the processed top sheet 22 and intermediate sheet 25 can be manufactured as a disposable diaper by assembling the absorbent body and the like according to a known method.
  • the non-woven fabric serving as the top sheet 22 is fed directly to the position where the push roll 90 and the concave roll 91 mesh with each other.
  • the nonwoven fabric to be the top sheet 22 may be fed into the concave roll 91 as it is, and then guided to be transferred to the peripheral surface of the concave roll 91.
  • the upper absorbent body 23A is a mixed fiber of pulp fibers and superabsorbent polymer particles, the basis weight of the pulp fibers is 351 g / m 2 , the basis weight of the superabsorbent polymer particles is 242 g / m 2 , and the thickness is 5. It was set to 0 mm. The total length of the upper absorbent body 23A was 480 mm, and the total width was 140 mm.
  • the superabsorbent polymer particles of the upper layer absorbent body 23A are screened using a standard sieve (JIS Z8801-1: 2006) having a water absorption rate of 38 seconds, a water absorption of 73 g / g, and 500 ⁇ m (shaking for 5 minutes), and this screening.
  • a standard sieve JIS Z8801-1: 2006
  • the proportion of particles remaining on the 500 ⁇ m standard sieve is 50 wt. %
  • the proportion of particles remaining on a 180 ⁇ m standard sieve was 50% by weight or more.
  • the slit 40 of the upper layer absorber 23A extends backward from the front end of the upper layer absorber 23A from a position of 25 mm to a position of 240 mm, its width 40W is 20 mm, and the interval 40D between the left and right slits 40 is 25 mm.
  • Lower absorbent body 23B has a mixed stacks of pulp fibers and superabsorbent polymer particles, the basis weight of the pulp fibers and 245 g / m 2, the basis weight of superabsorbent polymer particles and 91.7 g / m 2, a thickness It was 3.6 mm.
  • the total length of the lower layer absorber 23B was 570 mm, and the total width was 260 mm.
  • the superabsorbent polymer particles of the lower layer absorber 23B are screened using a standard sieve (JIS Z8801-1: 2006) with a water absorption rate of 28 seconds, a water absorption of 60 g / g, and 500 ⁇ m, and this screening.
  • a standard sieve JIS Z8801-1: 2006
  • the proportion of particles remaining on the 500 ⁇ m standard sieve is 25 wt. %
  • the ratio of particles remaining on a standard sieve of 180 ⁇ m was 70% by weight or more.
  • the wrapping sheet was crepe paper having a basis weight of 15 g / m 2 .
  • the top sheet is a hydrophilic two-layer air-through nonwoven fabric having a basis weight of 21 g / m 2 and a thickness of 0.15 mm.
  • the upper layer fiber is a 2.2 dtex core-sheath type composite fiber (core PP, sheath PE), and the lower layer fiber is 4.
  • a 4 dtex core-sheath composite fiber was used.
  • the intermediate sheet 25 was a hydrophilic air-through nonwoven fabric having a basis weight of 22 g / m 2 and a thickness of 0.14 mm using a core-sheath composite fiber (core PET, sheath PE) having a thickness of 2.2 dtex.
  • the top sheet 22 and the intermediate sheet 25 are joined by the manufacturing method shown in FIG. 14, and this joining makes the region 11 having the low transmission portion 80 of the pattern shown in FIG. Formed throughout.
  • Example 2 All were the same as in Example 1 except that the pattern of the low transmission part 80 was changed to the pattern shown in FIG.
  • Example 3 Except that the pattern of the low transmission part 80 was the pattern shown in FIG.
  • Example 4 Except that the pattern of the low transmission part 80 was the pattern shown in FIG.
  • the injection device 100 was installed on the top sheet 22 as shown in FIG.
  • the injection device 100 has a base portion 101 made of a flat plate of 240 mm in length and 110 mm in width, and an inner diameter of 44 mm that passes through the center of the base portion 101 and opens to the bottom surface of the base portion 101. What consists of the cylindrical part 102 with a thickness of 120 mm was used. In the test, as shown in FIG.
  • the center of the cylindrical portion 102 of the injection device 100 is positioned at the center in the front-rear direction and the width direction in the region between both slits 40, and the longitudinal direction of the base portion 101
  • the weight 103 having a weight of 0.5 kg and having a 10 cm ⁇ 10 cm square bottom surface on both sides in the longitudinal direction of the base portion 101
  • Measurement was performed by manually operating the stopwatch. The measurement was performed three times, and the average value was taken as the absorption rate.
  • Test results The test results are shown in FIG. Examples 1 to 4 according to the present invention were found to be superior in absorption rate as compared with Comparative Examples 1 and 2.
  • test location is temperature 20 ⁇ 5 ° C., relative humidity 65% or less
  • Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%.
  • a sample with a size of 200 mm ⁇ 250 mm ( ⁇ 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm ⁇ 250 mm, ⁇ 2 mm).
  • “Thickness” of the top sheet 22 and the intermediate sheet 25 shown in FIGS. 10 to 20 means an apparent thickness, and is measured by the method described in paragraph [0017] of Japanese Patent No. 3611838. That is, at the time of measurement, a measurement piece 30 mm long ⁇ 30 mm wide is cut out in a state where the top sheet 22 and the intermediate sheet 25 are joined. Then, a cut surface is formed by a line that is substantially parallel to the longitudinal direction [the fiber orientation direction of the nonwoven fabric (fiber assembly) constituting the top sheet 22 (flow direction at the time of manufacturing the nonwoven fabric)] and passes through the low transmission part 80.
  • Thickness of the absorber is a thickness measuring instrument from Ozaki Manufacturing Co., Ltd. (peacock, dial thickness gauge large type, model JB (measurement range 0 to 35 mm) or model K-4 (measurement range 0 to 50 mm)) Measure the sample and the thickness meter horizontally. “Thickness” other than the above is automatically measured using an automatic thickness measuring instrument (KES-G5 handy compression measurement program) under the conditions of load: 10 gf / cm 2 and pressure area: 2 cm 2 . The water absorption is measured according to JIS K7223-1996 “Test method for water absorption of superabsorbent resin”.
  • the water absorption rate is the “time to end point” when JIS K7224-1996 “Test method for water absorption rate of superabsorbent resin” is performed using 2 g of superabsorbent polymer and 50 g of physiological saline.
  • "Artificial urine” is urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97 0.09 wt% is mixed and used at a temperature of 40 degrees unless otherwise specified.
  • test and measurement shall be performed in a test room or equipment in the standard condition (test location is temperature 20 ⁇ 5 °C, relative humidity 65% or less). . -Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.
  • the present invention is suitable for the pad type disposable diaper as in the above example, but can also be used for other types of disposable diapers such as a pants type or a tape type disposable diaper.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2017/006997 2016-02-29 2017-02-24 使い捨ておむつ WO2017150358A1 (ja)

Priority Applications (3)

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US16/080,065 US11013643B2 (en) 2016-02-29 2017-02-24 Disposable diaper
EP17759824.0A EP3424476B1 (en) 2016-02-29 2017-02-24 Disposable diaper
CN201780012902.9A CN108697563B (zh) 2016-02-29 2017-02-24 一次性尿布

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JP6240701B2 (ja) * 2016-03-30 2017-11-29 大王製紙株式会社 パンツタイプ使い捨ておむつ
CN110248628A (zh) * 2017-01-31 2019-09-17 宝洁公司 成型的非织造织物和包括所述织物的制品
WO2019005906A1 (en) 2017-06-30 2019-01-03 The Procter & Gamble Company NON-WOVEN FABRIC
US10577722B2 (en) 2017-06-30 2020-03-03 The Procter & Gamble Company Method for making a shaped nonwoven
JP7128616B2 (ja) * 2017-09-28 2022-08-31 大王製紙株式会社 パッド
US10792199B2 (en) 2018-02-23 2020-10-06 The Procter & Gamble Company Substrates and laminates for absorbent articles
JP7636132B2 (ja) * 2018-12-04 2025-02-26 王子ホールディングス株式会社 吸収性物品
US11505884B2 (en) * 2019-03-18 2022-11-22 The Procter & Gamble Company Shaped nonwovens that exhibit high visual resolution
IT201900012675A1 (it) * 2019-07-25 2021-01-25 Fater Spa Struttura assorbente e articolo igienico assorbente
JP7342513B2 (ja) * 2019-08-13 2023-09-12 王子ホールディングス株式会社 吸収性物品
EP3928754A1 (en) * 2020-06-24 2021-12-29 Associated Hygienic Products LLC Absorbent articles with channeled absorbent cores
CN116438343A (zh) 2020-10-30 2023-07-14 宝洁公司 用于使纤维网变形的设备和方法
WO2022088040A1 (en) * 2020-10-30 2022-05-05 The Procter & Gamble Company Nonwoven and absorbent articles having the same

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US11013643B2 (en) 2021-05-25
US20190060140A1 (en) 2019-02-28
CN108697563A (zh) 2018-10-23
TWI711435B (zh) 2020-12-01
JP6250719B2 (ja) 2017-12-20
TW201731468A (zh) 2017-09-16
EP3424476A1 (en) 2019-01-09
JP2017153587A (ja) 2017-09-07
CN108697563B (zh) 2021-11-09
EP3424476B1 (en) 2022-08-10

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